ATT Dect 6.0 User Manual

44

Operation
Options while on calls
Switching between PHONE mode and PC mode
You can switch back and forth between PHONE mode and PC 
mode while on a call by pressing the corresponding mode button 
on the headset base. Once selected, the PHONE mode light or 
the PC mode light flashes twice every three seconds to indicate 
that line is on hold.
When you have two registered headsets in use at the same time, 
you can still change the mode by pressing the corresponding 
mode button on the headset base....

45

Appendix
Adding and registering headsets
Registration options
The TL7912 headset comes pre-registered to the headset base.  
There are two registration options, as described below.
Option 1: If you have previously deregistered your TL7912 
headset from the headset base and want to register 
it back to the same base or another TL7912 headset 
base, see page 46. 
Option 2: You can deregister your TL7912 headset (see page 
49) and then register it to an AT&T DECT 6.0 cordless 
telephone (see pages...

46

Appendix

Adding and registering headsets
Register a headset to your TL7912 headset base
Make sure the battery is properly installed in 
the headset (see page 12). The  light flashes 
slowly in red and blue to indicate the headset 
is not registered.
Place the headset in the headset base and 
allow it to charge for at least one hour before 
beginning registration.
Remove the headset from the headset base.
Press and hold the PAIR button (about four 
seconds) until the MUTE light on the headset 
base...

47

Appendix

Adding and registering headsets
Register a headset to an AT&T DECT cordless telephone base
You must deregister the headset from the 
headset base first (see page 49).
Make sure the battery is properly installed 
in the headset (see page 12). The  light on 
the headset flashes slowly in red and blue to 
indicate the headset is not registered.
Place the headset in the headset base and 
allow it to charge for at least one hour before 
beginning registration.
Remove the headset from the...

48

Appendix

Adding and registering headsets
Register a headset to an AT&T DECT cordless telephone base 
(cont.)
It takes about 60 seconds to complete the registration process. 
The  light turns red when the headset is registered but not fully 
charged, or turns blue when it is registered and fully charged.
To verify the registration, press the  button on the headset and 
check for a dial tone. If the registration fails, you hear the voice 
prompt "Not registered" and the  light on the headset...

49

Appendix

Deregistering headsets
You may need to deregister your headsets if:
You wish to register your headset to an AT&T DECT 6.0 cordless 
telephone or a different headset base.
-OR-
You have two registered headsets and need to replace one of them. 
You must first deregister both headsets, and then register each 
headset you wish to use again, one at a time.
Please read carefully through all the instructions on this page 
before beginning the deregistration process.
Deregister all headsets from...

50

Appendix

Troubleshooting
If you have difficulty with your telephone, please try the 
following suggestions. For customer service, visit our website at 
www.telephones.att.com or call  
1 (800) 222–3111. In Canada, dial 1 (866) 288-4268.
My headset doesn’t work at all.
•  Make sure the power cord is securely plugged in.
•  Make sure that the battery is securely installed in the  
cordless headset.
•   Make sure the telephone line cord is securely and firmly 
plugged into the headset base and the...

51

Appendix

There is no dial tone.
•  Try all the suggestions mentioned above.
•  Move the cordless headset closer to the headset base. You 
might have moved out of range.
Make sure that the CORDED HANDSET CONNECTED switch is 
set properly (page 16, 18 or 21).
•  Your telephone line cord may be defective. Install a new  
telephone line cord.
Another phone on the same phone line may be in use.
•   If the previous suggestions do not work, disconnect the 
headset base from the telephone jack and connect...

52

Appendix

I cannot dial out.
•  Try all the suggestions mentioned above.
•   You must use a telephone on the same line to dial out. Once 
you have dialed the number, you can press  to join the call 
(page 39). 
•   If other phones in your home or office are having the same 
problem, the problem is in your wiring or local service. Contact 
your telephone service provider (charges may apply).
My cordless headset isn’t performing normally.
• Make sure the power cord is securely plugged into the headset...

53

Appendix

I get noise, static, or a weak signal even when I’m near the 
headset base.
•   If you subscribe to high-speed Internet service (DSL - digital 
subscriber line) through your telephone line, you must install a 
DSL filter between the telephone line cord and the telephone 
wall jack. The filter prevents noise and caller ID problems 
caused by DSL interference. Contact your DSL service provider 
for more information about DSL filters.
•   You may be able to improve the performance of your...